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Bureau of Mines, Dept. of Int., between 1910 and 1920. Man placing samples in a furnace. The United States Bureau of Mines (USBM) was the primary US government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources. Bureau of Mines, Dept. of Int., between 1910 and 1920. Creator: Harris & Ewing. (KEYSTONE/HERITAGE IMAGES/HERITAGE ART)